java - 如何在 Spring Boot 中将多部分文件从一个服务传递到另一个服务？

Question

我想将多部分文件从一项服务传递到另一项服务。

客户端 --> 服务 1 --> 服务 2

当我将文件从 Service1 传递到 Service2 时，这会显示错误“500 内部服务器错误，当前请求不是多部分请求”

客户端 --> Service2 当我直接发送文件时其工作正常，但不通过 Service1

我想知道可能是什么原因，我想我在传递多部分文件作为参数时丢失了一些 header 部分。

服务2

@PostMapping(path="/upload")
public ResponseEntity<Properties> upload(@RequestParam("file") MultipartFile multiPart) {
    return saveFile(multiPart);
}

Service2-客户端

@FeignClient
(name="${feign.upload.serverId}", configuration = UploadServiceClientConfiguration.class, decode404 = true)
public interface UploadServiceClient {

    @PostMapping(path="/upload")
    ResponseEntity<Properties> upload(@RequestParam("file") MultipartFile multiPart);

    class UploadServiceClientConfiguration {
        @Value(value="${feign.upload.user}")
        String user;
        @Value(value="${feign.upload.password}")
        String password;
        @Bean
        public BasicAuthRequestInterceptor basicAuthRequestInterceptor() {
            return new BasicAuthRequestInterceptor(user, password);
        }
    }
}

服务1

@Autowired
UploadServiceClient uploadSvcClient;
@PostMapping(path="/upload")
public ResponseEntity<Properties> uploadAttachment(@RequestParam("file") MultipartFile file) {
    return uploadSvcClient.upload(file);
}

Answer 1

终于能够使用帖子 File upload spring cloud feign client 解决与另一个服务的通信问题

我已更改 FeignClient 参数类型

@RequestParam("file") MultipartFile mFile

到

@RequestPart("file") MultiValueMap 文件。

FeignClient 签名

@PostMapping(value="/upload", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
        ResponseEntity<Properties> upload(@RequestHeader(name=UID,required=false) String uid, @RequestPart("file") MultiValueMap<String, Object> file);

服务1实现

@PostMapping(path="/upload")
    public ResponseEntity<Properties> uploadAttachment(@RequestHeader(IRSConsts.UID) String uid, @RequestParam("file") MultipartFile mFile) {
        MultiValueMap<String, Object> multiValueMap = new LinkedMultiValueMap<>();
        ByteArrayResource contentsAsResource = null;
        try {
            contentsAsResource = new ByteArrayResource(mFile.getBytes()) {
                @Override
                public String getFilename() {
                    return mFile.getOriginalFilename();
                }
            };
        } catch (IOException e) {
            e.printStackTrace();
        }
        multiValueMap.add("file", contentsAsResource);
        return transSvcClient.upload(uid, multiValueMap);
    }

服务2实现

@PostMapping(path = "/upload")
    @Headers("Content-Type: multipart/form-data")
    public ResponseEntity<Properties> upload(@RequestHeader(name = UID, required = false) String uid,
            @RequestPart("file") MultipartFile multiPart) {
        //Save Attachment.
    }